Rapid Crack Propagation and Arrest in Polymers.

Abstract

Published fracture dynamic properties of four birefringent polymers, i.e. polyester resin Homalite-100, epoxy resin Araldite B, modified epoxy resins and polycarbonate, determined by dynamic photoelasticity and dynamic caustics are reviewed. Despite mounting evidence of unique dynamic fracture toughness, KID, versus crack velocity, A, relations of these polymers fractured under static loading, such relations could not be duplicated in fracture specimens loaded dynamically. The existence of unique KID versus A relations and the validity of a minimum dynamic fracture toughness, KIM, as a conservative estimate of the crack arrest stress intensity factor for polymers subjected to dynamic loading remains in doubt. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA046623

Entities

People

  • Albert S. Kobayashi
  • S. Mall

Organizations

  • University of Washington

Tags

Communities of Interest

  • C4I
  • Space

DTIC Thesaurus Topics

  • Crack Propagation
  • Cracks
  • Engineering
  • Epoxy Resins
  • Materials
  • Mechanical Engineering
  • Military Research
  • Polymers
  • Resins
  • Ship Hulls
  • Stress Intensity Factors
  • Stresses
  • Toughness
  • United States
  • United States Government
  • Universities

Readers

  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials